Question

classification of protochordates

Answer 1

Protochordata/Acraniata/Non vertebrate chordates is a sub group under chordata which involves chordates without cranium or brain box.

Their basic features include:

Presence of notochord

Central nervous system is dorsal,hollow and single

Pharynx perforated by Gill slits

Heart is ventral

A post anal tail is present

Gut is ventral to nerve chord.

Absence of cranium or brain box.

They are further divided into 2 sub phylums,

Urochordata

Cephalochordata